JPH08134821A - Artificial lawn made of synthetic resin and production device thereof - Google Patents

Abstract

PURPOSE: To form artificial lawns at a low cost by forming recessed sections for fitting to one sides in the two mutual parallel sides of the quadrilateral artifial lawns made of a synthetic resin and forming projecting sections for fitting to the other sides. CONSTITUTION: Leaf-like sections 2 consisting of a plurality of leaf pieces 22 made of a synthetic resin are arranged to quadrilateral beltlike base body sections 1 made of the synthetic resin at regular intervals, and the roots 21 of the leaf-like sections 2 are formed integrally. Ribs 11 are located in upright to the top faces of one sides of the beltlike base body sections 1 to form recessed sections 12 for fitting while the other sides are bent and projecting sections 13 for fitting are shaped to the undersides of the other sides, thus forming synthetic-resin artificial lawns A. The projecting sections 13 are fitted into the recessed sections 12 for fitting of the adjacent artificial lawns A at the time of the execution of works, thus mutually joining the artificial lawns A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin artificial turf and an apparatus for producing the same, and more specifically, a plurality of synthetic resin belt-shaped base portions are arranged in parallel at intervals. A plurality of synthetic resin leaf-shaped portions are arranged at intervals in the longitudinal direction of the base portion, and each leaf-shaped portion is composed of a plurality of bent leaf pieces and is integrally formed with an adjacent base portion. The present invention relates to a synthetic resin artificial grass and a manufacturing apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, as described in JP-B-48-44721, a plurality of synthetic resin belt-like base portions are arranged in parallel at intervals, and a plurality of base portions are provided between these base portions. The synthetic resin leaf-shaped parts are arranged at intervals in the longitudinal direction of the base part, and each leaf-shaped part is composed of a plurality of bent leaf pieces and is integrally formed with the adjacent base part. Artificial turf made is known. Such synthetic resin artificial turf is used for rugs such as roofs, balconies of general houses, hotels, department stores, etc. by joining multiple things, and recently tennis, baseball, gateball and other competitions. It is also laid in the field and practice area.

Conventionally, for example, as described in Japanese Utility Model Laid-Open No. 56-73708, a surface fastener is adhered or sewn to the ends of the artificial grass, and the ends are joined by the surface fastener. The structure is known.

[0004]

However, as described in Japanese Utility Model Laid-Open No. 56-73708, when the ends of the artificial grass are joined by surface fasteners, the surface fasteners are bonded to the ends of the artificial grass. If there is deterioration of the adhesive, if you sew the surface fastener to the end of the artificial grass, there is a fray, the surface fastener comes off from the end of the artificial grass, and the ends of the artificial grass are joined together. There is a drawback that it comes off. or,
In such an artificial grass, there are disadvantages that the number of steps is increased for attaching the surface fastener to the end portion of the artificial grass, and the cost of the surface fastener is high, resulting in high cost.

The present invention has been made as a result of earnest research focusing on such problems in the conventional synthetic resin artificial turf. The object of the present invention is to solve the problems in the conventional synthetic resin artificial turf. A synthetic resin artificial turf and a manufacturing apparatus therefor that can solve the problems and can bond synthetic resin artificial turf without using a surface fastener or the like and can be provided inexpensively without requiring man-hours for mounting the surface fastener or the like. It is in.

[0006]

In order to achieve the above object, the synthetic resin artificial turf according to the first aspect of the present invention comprises a plurality of synthetic resin belt-shaped base portions arranged in parallel at intervals. A plurality of synthetic resin leaf-shaped portions are arranged between these base portions at intervals in the longitudinal direction of the base portion, and each leaf-shaped portion is composed of a plurality of leaf pieces and is integrally formed with an adjacent base portion. In the quadrilateral synthetic resin artificial grass formed in,
One of the two sides parallel to each other is provided with a fitting concave portion, and the other one side is provided with a fitting convex portion.

According to a second aspect of the present invention, the synthetic resin artificial turf manufacturing apparatus is provided with a molding drum and a resin supply mold, and a plurality of bases parallel to the outer peripheral surface of the molding drum along the circumferential direction. Part forming grooves are provided, and leaf-shaped part forming cavities are provided at a constant pitch between the base part forming grooves. By supplying synthetic resin from the resin supply mold onto the outer peripheral surface of the forming drum, the base part is formed. In a synthetic resin artificial grass manufacturing apparatus for continuously molding artificial grass composed of leaf-shaped parts integrally formed with a base and a base part in a fixed direction, a fitting recess is provided on one side of the front surface of a resin supply mold. It is characterized in that a molding convex portion is provided, and a fitting convex portion molding concave portion is provided on the other side of the front surface of the resin supply mold.

In the present invention according to claims 1 and 2, the synthetic resin constituting the base portion and the leaf-shaped portion is not particularly limited, and examples thereof include low density polyethylene, medium density polyethylene, high density polyethylene, Olefins such as linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-vinyl acetate copolymer, vinyl chloride resin, vinylidene chloride resin, vinyl chloride-acetic acid Vinyl chloride resin such as vinyl copolymer, styrene resin such as polystyrene, amide resin such as nylon 6, nylon 6.6 and nylon 6.10, polyester such as polyethylene terephthalate and polybutylene terephthalate, and other synthesis Resin can be used. These synthetic resins may be used alone or in combination of two or more kinds, but an olefin resin is preferable from the viewpoint of moldability and economy.

It is preferable that the base portion synthetic resin and the leaf portion synthetic resin use the same kind of synthetic resin, but different synthetic resins may be combined as long as they are compatible with each other. Further, if necessary, a pigment for coloring, an antioxidant for imparting climate resistance, a light stabilizer, a lubricant which is a processing aid, and the like may be added.

In the synthetic resin artificial turf according to the first aspect of the present invention, the quadrilateral shape includes a long rectangle in addition to a square or an ordinary rectangle.

[0011]

In the artificial grass made of synthetic resin according to the present invention, one of the two parallel sides is provided with a fitting recess, and the other one is provided with a fitting projection. Therefore, by fitting the fitting concave portion on one side and the fitting convex portion on the other side, it is possible to join the plurality of synthetic resin artificial grasses.

According to the second aspect of the present invention, the synthetic resin artificial turf manufacturing apparatus is provided with a fitting recess forming projection on one side of the front surface of the resin supply mold, Easily manufacture synthetic resin artificial turf with a fitting recess on one side and a fitting recess on the other side, because the fitting protrusion molding recess is provided on the other side of the front surface. can do.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. [Example 1: Example of the invention according to claim 1] Fig. 1 is a perspective view showing an example of the synthetic resin artificial turf of the present invention. In FIG. 1, A is a quadrilateral synthetic artificial turf of the present invention, 1,
.. are strip-shaped base portions of the synthetic resin artificial turf A, and the strip-shaped base portions 1, 1, ... Are arranged in parallel at regular intervals. .. are leaf-shaped portions, a large number of which are arranged between the base portions 1 and 1 adjacent to each other at regular intervals, and the roots 21 of the leaf-shaped portions 2, 2, ... It is formed integrally with the part 1.

Each leaf-shaped portion 2, 2, ... Is a plurality of leaf pieces 2.
It consists of 2, 22, ... The leaf pieces 22 may be bent. The fitting recess 12 is formed by arranging the rib 11 on the upper surface of the base portion 1 on one side of the synthetic resin artificial turf A, and the fitting recess 12 is formed by inclining one inner wall surface of the fitting recess 12. 12 is widened in the back. In the base part 1 on the other side of the synthetic resin artificial turf A and the leaf-shaped parts 2, 2, ... Adjacent to the base part 1, they are bent and provided at the upper position, and the fitting convex part 13 is provided on the lower surface thereof. Is provided, the one side surface of the fitting projection 13 is inclined, so that the fitting projection 13 has a thickened tip.

[Operation of Embodiment 1] In the synthetic resin artificial turf A of the present invention shown in FIG. 1, a fitting recess 12 is provided on the upper surface of the base portion 1 on one side, and the base portion 1 on the other side and Since the fitting protrusions 13 are provided on the lower surfaces of the leaf-shaped portions 2, 2, ... Adjacent to the base portion 1, the fitting protrusions 13 are fitted in the fitting recesses 12 as shown in FIG. By combining, the synthetic resin artificial turf A of the present invention can be joined.

[Example 2: Example of the invention according to claim 1] Fig. 3 is a perspective view showing another example of the synthetic resin artificial grass of the present invention. In the synthetic resin artificial turf A of the present invention shown in FIG. 3, the fitting recesses 12 are widened by inclining both inner wall surfaces of the fitting recesses 12, and both side surfaces of the fitting projection 13 are formed. The fitting projection 13 has a thickened tip due to the inclination.

[Operation of Embodiment 2] In the synthetic resin artificial turf A of the present invention shown in FIG. 3, the fitting recess 12 is provided on the upper surface of the base portion 1 on one side, and the base portion 1 on the other side and Since the fitting projections 13 are provided on the lower surfaces of the leaf-shaped portions 2, 2, ... Adjacent to the base portion 1, the fitting projections 13 are fitted into the fitting depressions 12 as shown in FIG. By combining, the synthetic resin artificial turf A of the present invention can be joined.

[Embodiment 3: Embodiment of the invention described in claim 2] FIG. 5 is an explanatory view showing an example of the manufacturing apparatus of the present invention, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, and FIG. FIG. 8 is a perspective view partially showing the drum, and FIG. 8 is a perspective view partially showing the mold. The manufacturing apparatus of the present invention comprises a resin-supplying mold 3 and a molding drum 4. In the vicinity of the central portion of the outer peripheral surface of the forming drum 4, base body forming grooves 41 parallel to each other are provided at regular intervals along the circumferential direction, and the forming drums 4 are provided between the base body forming grooves 41. Leaf-shaped portion forming cavities 42 are provided at regular intervals along the circumferential direction. A base portion and a fitting concave portion forming groove 43 and a base portion and a fitting convex portion forming groove 44 are recessed along the circumferential direction on both sides of the outer peripheral surface of the forming drum 4. Reference numeral 45 denotes a protruding portion that is provided between the leaf-shaped portion forming cavities 42.

A partition 31 is provided near the center of the front surface of the resin-supplying mold 3 so as to fit into the base portion molding groove 41 of the molding drum 4. On both sides of the front surface of the metal mold 3 for supplying resin, a fitting concave portion forming portion 32 and a fitting convex portion forming portion 33 are formed.
The fitting concave portion forming portion 32 is provided with a fitting concave portion forming convex portion 321. The fitting convex portion forming portion 33 is provided with a fitting convex portion forming concave portion 331. Fitting recess forming part 3
Reference numeral 2 is fitted in the base portion of the molding drum 4 and the fitting concave portion forming groove 43, and the fitting convex portion forming portion 33 is fitted in the base portion of the forming drum 4 and the fitting convex portion forming groove 44.

In the resin supply mold 3, 34 is a nozzle for injecting synthetic resin into the base portion forming groove 41 of the forming drum 4, 35 is a nozzle for injecting synthetic resin into the leaf-shaped portion forming cavity 42, and 36 is a fitting. A nozzle for injecting a synthetic resin into the recessed portion 331 for forming a fitting convex portion, 37 is a nozzle for injecting a synthetic resin into the groove 43 for fitting recessed portion forming, and each nozzle 3
4, 35, 36 and 37 are opened on the front surface of the mold 3.

The tip of the nozzle 34 for injecting the synthetic resin into the base portion molding groove 41 is arranged in the vicinity of the end of the partition member 31 on the downstream side of the partition member 31 in the rotational direction of the molding drum 4. The tip of the nozzle 35 for injecting the synthetic resin into the leaf-shaped portion forming cavity 42 is formed by the partition members 31.
It is located between.

[Operation of Embodiment 3] Next, the operation of the device of the present invention shown in FIGS. From the nozzles 34, 35, 36, 37 of the resin supply mold 3 to the molding drum 4
The synthetic resin is injected into the base portion molding groove 41, the leaf-shaped portion molding cavity 42, the fitting concave portion molding groove 43, and the fitting convex portion molding concave portion 331 of FIG.
As shown in (1), the artificial grass A having the base portion 1 and the leaf-shaped portion 2 and the fitting concave portions 12 and the fitting convex portions 13 provided on both sides is continuously molded. After that, the molded artificial grass A
Is taken up by a take-up machine (not shown) and taken up by a take-up machine.

Although the embodiments of the present invention have been described above with reference to the drawings, the configuration of the present invention is not limited to the illustrated embodiments, and design changes within the scope of the present invention are included in the present invention. Be done. For example, the cross-sectional shapes of the fitting protrusion and the fitting recess may be circular instead of being square as in the illustrated embodiment. Further, the number of the fitting protrusions and the fitting recesses may be plural, instead of being one as in the illustrated embodiment.
Further, in the illustrated embodiment, the fitting protrusion and the fitting recess are provided only on two parallel sides, but they may be provided on the other two sides adjacent to the two parallel sides. .

[0024]

In the synthetic resin artificial turf according to the first aspect of the present invention, one of the two sides parallel to each other is provided with a fitting concave portion and the other one side is provided with a fitting convex portion. Therefore, a plurality of synthetic resin artificial turf can be joined to each other by fitting the fitting concave portion on one side and the fitting convex portion on the other side.

In the synthetic resin artificial turf manufacturing apparatus according to the present invention, the fitting recess forming projection is provided on one side of the front surface of the resin supplying mold, and the fitting mold for forming the resin supplying mold is provided. Easily manufacture synthetic resin artificial turf with a fitting recess on one side and a fitting recess on the other side, because the fitting protrusion molding recess is provided on the other side of the front surface. can do.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of an artificial grass of the present invention.

FIG. 2 is an enlarged front view showing a joint portion of the artificial grass of the present invention shown in FIG.

FIG. 3 is a partially cutaway perspective view showing another example of the artificial grass of the present invention.

FIG. 4 is an enlarged front view showing a joint portion of the artificial grass of the present invention shown in FIG.

FIG. 5 is an explanatory view showing an example of the manufacturing apparatus of the present invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view partially showing a forming drum.

FIG. 8 is a perspective view partially showing the mold.

[Explanation of symbols]

 A artificial turf 1 of the present invention 1 base portion 11 rib 12 fitting concave portion 13 fitting convex portion 2 leaf-like portion 21 root 22 leaf piece 3 mold 31 partition portion 32 fitting concave portion molding portion 321 fitting concave portion convex portion 33 fitting convex portion Part forming part 331 Fitting convex part forming concave part 4 Forming drum 41 Base part forming groove 42 Leaf shaped part forming cavity 43 Base part and fitting concave part forming groove 44 Base part and fitting convex part forming groove

Claims (2)

[Claims] 1. A plurality of synthetic resin strip-shaped base portions are arranged in parallel at intervals, and a plurality of synthetic resin leaf-shaped portions are arranged between these base portions in the longitudinal direction of the base portion. In a quadrilateral synthetic resin artificial turf, which is arranged apart from each other, each leaf-shaped portion is composed of a plurality of leaf pieces, and is integrally formed with an adjacent base portion, on one of two sides parallel to each other. Is an artificial turf made of synthetic resin, which is provided with a fitting concave portion and a fitting convex portion on the other side. 2. A molding drum and a resin supply mold are provided, and a plurality of base body forming grooves parallel to the circumferential direction are provided on the outer peripheral surface of the forming drum, and between the base body forming grooves. The leaf-shaped part forming cavities are provided at a constant pitch, and by supplying synthetic resin from the resin supply mold onto the outer peripheral surface of the forming drum, the artificial grass composed of the base part and the leaf-shaped part integrally formed on the base part is fixed. In a synthetic resin artificial turf manufacturing apparatus that sequentially and sequentially molds, a fitting recess molding projection is provided on one side of the front surface of the resin supply mold, and A synthetic resin artificial turf manufacturing apparatus, characterized in that a fitting convex molding concave portion is provided on the side.